5)Now your project contains 2 bindinginfo (*.xml, 1 Orchestration (*.odx), and 9 Schemas (*.xsd).
Build your project, you will see atleast 121 errors. Because these are not valid schemas for this endpoint. They do not have the proper links between each other.

9)Now ReBuild the project, you will still get the error. Because Orchstration 'Multi-part Message Type' pointed the worng schema name ( Red Exclamatory inside the Round Symbol).
Here you can two options to point correct schem - One by One or Replace.